Compression ratio. Automotive engines with variable valve timing benefit from higher octane. Will run fine on 87, but better on 93. I run premium fuel in a VVT engine and see up to 2 mpgs increase on highway trips. Small increase noticeable in mixed driving. Engine has a little more "pep" with the 93. That said, I run 91 pump gas or canned fuel in all my 2-strokes. Can I tell a difference? Not really (maybe a tad with the canned stuff). But for the relatively small amount of fuel used overall, the extra cost is moot.
Basically from what I am reading that it is not really worth the trouble to remove ethanol from the fuel. From what I saw you take a cup of water and add it to a gallon of fuel, shake, then let it sit and let the ethanol bind with the water and then you drain the water/ethanol off.
Also keep in mind, when you remove the ethanol from the fuel, your also removing the octane rating...... You gotta replace the ethanol with something else to bump the octane back up. Thankfully, we have an airport nearby where you can get 101 low lead, and a gas station the next town down just started selling 91 non-ethanol gas, that's my new go-to gas station.....
I have a 034 my dad bought new in 1986 I believe and to my knowledge and his it's never had the carb rebuilt or the fuel line replaced and runs like a champ and has only ever had the cheapest you can buy in it. The higher the octane the more power you loose. Get past 93 and you will notice some of the snap is gone
Has nothing to do with vvt. Engines nowa days are running higher cr, but it's knock sensors that pull timing, which leads to less mpgs. Ethanol is a great fuel. I run everything on the cheapest e10 87, except performance motors.
Are you saying that I'm lying about my mileage? Or are you saying that yes, lower octane in a variable lift system gets less mpgs? Fastest street car I've rode in was a Chevy.
Not really. Many people use to take old cars they like the body of but hotroded them with other engines.
That could be. We race 1/8th mile drag radial cars here and there's some very fast cars,on a Saturday night street car race 80-90% of the cars will be fords,wanna guess how many have a Ford motor? A 400$ 100000 mile junkyard ls will make 1000hp without ever taking the heads or oil pan off,there is no ford motor that will do that. A Ford will make 1000hp but it will cost 10 times more and that's why there is very few people running ford motors. Takes a Ford chassis to keep from spinning and a chevy motor to be fast. Ain't taking sides that's just how it is.
We have a Real Street class here. It is a small tire class. Mustangs with mod motors pretty much dominate it other than a guy with a Chevelle that has something figured out. A junkyard LS might make 1000hp but it won't take it for long. The 03-04 Cobra's could take 1000hp. It really does not cost more to build a Ford. The Fox Chassis is superior to anything in stock suspension class. I just don't understand if people like a Chevy engine why they don't put it in a Chevy. I've never seen a Chevy that I would like to put a Ford engine in.
I'm saying it's not the vvt ....it's simply the engine picking up knock and pulling timing. Like I said vvt has nothing to do with it. Lower octane in any motor with knock will get less milage.
I've never heard of a ls failing. There the only ones that wil take it There girdeled in the lifter valley and at the mains. Takes over 20 psi to split one. Like I said if there was something better to use then everyone wouldn't use one. You put a chevy motor in a fox body because you can make way more hp for the money and the fox body is a 4 link race car from the factory basically so you can put way more hp to the ground instead of spinning. We run small tires,275 drag radial.